Mini Cooper AC Recharge DIY | Fix Warm Air Fast Using R-134a Refrigerant | Buke’s World, by Buke's World on YouTube. 5 min 36 s.
- Video length
- 5 min 36 s
- Time to do it
- 20 minutes
- Difficulty
- Medium
- Steps
- 10
What you need
Steps
Check the under-hood AC sticker or your owner's manual to confirm your Mini uses R-134a, not the newer R-1234yf. The two refrigerants and their fittings are not interchangeable.
Start the engine and set the AC to maximum cold with the fan on high. Let it run a few minutes so the compressor engages.
Open the hood and find the low-pressure service port. It is the smaller port on the AC line, usually with a black or blue cap.
Put on safety glasses and gloves. Wipe dirt from the port and cap so nothing falls into the system.
Screw the recharge hose onto the can as the can instructions say. Do not pierce the can until the hose is tight.
Snap the quick-connect coupler onto the low-pressure port. It should click and lock. Never connect to the high-pressure port.
Read the gauge with the compressor running. If pressure is low, open the valve and let refrigerant flow in short bursts while you watch the gauge.
Stop when the gauge reaches the middle of the green range on the can, or the pressure the can label lists for your outside temperature. Do not overfill.
Close the valve, disconnect the coupler from the port, and refit the port cap. Feel the vents for cold air.
If the air stays warm or the pressure drops again within days, you likely have a leak. Have a shop find and fix it before adding more refrigerant.
Tips and common mistakes
Never open the high-pressure port or turn the can upside down unless the label says to, since liquid refrigerant can damage the compressor.
Add refrigerant slowly in short bursts with the AC running so the system can pull it in.
Recharging only masks a leak, so a system that loses cold air again soon needs a proper leak test.
Keep refrigerant away from your skin and eyes, and work in a ventilated space away from flames.
Questions
How do I know if my Mini uses R-134a?
Check the sticker under the hood or your owner's manual. Most Minis up to around 2017 use R-134a, while many newer models use R-1234yf with different fittings.
Can I recharge the AC without a gauge?
It is not recommended. A gauge on the recharge hose shows the system pressure so you can stop before overfilling, which can damage the compressor.
Why is my AC still warm after recharging?
A leak, a failed compressor, a bad blend door or a clogged condenser can all cause warm air. If pressure drops again quickly, get the system checked by a mechanic.
This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.
